You mean she spies on the MC in the shower?
![Stick out tongue :p :p](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
That said, as someone who hasn't actually tried it out:
How many choices will actually influence later happenings - can't be all, or it'll never get done.
When you say some people played it 6 times and haven't seen all content - I actually usually play it twice at most, unless there's actual different routes come the second half or so - I chose something, it's my decisions, going back and doing it just a slight bit differently would make it feel kinda cheap, no?